Pinion puller



T. H. JACOB.

PINION FULLER.

APPLlCATlON FILED DEC-I61 i919.

1A36,8@6, I Patented N V- 28; 1922..

Patented lzlov. 28, i922.

inn

ime.

ri-roivrns JACOB, or Wnusnn, Wisconsin, nssre-noa'ro ne'nrnnson TOOL 00., on

' wausau, W sconsin,

PIN-ION Application filed December T 0 all whom it wmg concern Be it known that I, 'lnonAs H. JACOB, a citizen of the United States, and resident of Nausau, in the county of Marathon and State of Wisconsin, have invented certain new and useful improvements in Pinion Pullers; and I do hereby declare that the following is a full, clear, and exact description thereof.

My invention relates to new and useful improvements in means for removing pinions or other members from shafts on which they are keyed or otherwise secured.

It is in general the object of my invention to simplify and otherwise improve the structure and to increase the eiflciency and convenience of manipulation of devices of this character.

It is more particularly my object to pro vide a pulling device which in operation exerts an even pressure upon circumferential portions of the member to be withdrawn, and which is provided with a bearing connection for the shaft on which the member is mounted, to insure such even distribution of pressure. p

A further object resides in the provision of a puller device for pinions which may be operatively associated therewith by placing the body of the device over the pinion and then partially rotating said body to procure interlocking relation of the pinion teeth with portions of the body.

With the above and other objects and advantages in view, which will be apparent as the description proceeds, my invention resides in the novel features of construction, combination and arrangement of the parts as hereinafter described and defined by the appended claim.

In the accompanying drawings:

Figure 1 is an end view of my improved pinion pulling device with a pinion disposed therein, a portion of the device being broken away.

Figure 2 is a sectional View through the device and pinion.

Referring now more particularly to the drawings, the body member of my improved pinion pulling device comprises in the present instance a cylindrical block having a recess 6 formed in one end and adapted to receive a pinion p or other member which it 16, 1319. Serial No. 345,208.

would be desired to withdraw or remove from a shaft 3 on which said member is secured by a key 70. T he block isprovided with an axial bore 7 therethrough communicating with the recess, the inner portion of said bore having a plain surface, while the outer portion of the bore is threaded for the reception of a pressure screw 8 having a turning head 9 on its outer end and having its inner end reduced and unthreaded to provide an abutment head 10 for engagement with the end of the shaft 8. F or securing a pinion in the recess 6, an inwardly extending annular flange 11 is provided at the mouth of the recess and is provided with an annular series of passages 12 for the teeth of the pinion whereby, when the teeth have been passed through the flange into the recess, and the block or pinion partly turned, each of said teeth may have a firm seating engagement with the flange. The limit of rotating movement to procure this seating engagement is determined by a pin 18 projecting inwardly from the wall of the recess for abutment with one of the pinion teeth. Thus to pull or remove the pinion p from the shaft 8, it is merely necessary to mount the block 5 on the pinion with said pinion disposed in its recess, and then partially turn one of the members and then rotate the screw 9 to exert pressure on the end of the shaft 3, which has entered the bore 7 when the pinion is engaged in the recess and which consequently affords a hearing for the block 5 and holds same centered with respect to the pinion whereby an even withdrawing pressure is exerted on all of the teeth of the pinion thus increasing the effective strength of the device by a uniform distribution of stress in its operation. It will be noted that in the operation of my improved puller, when the screw 8 is rotated to pull on the pinion its frictional engagement with the body member 5 will have atendency to rotate the latter, and will consequently urge the pin 13 firmly against the pinion tooth on which it engages and therefore hold the teeth of the puller in proper position in relation to the teeth of the pinion.

While I have shown and described a preferred embodiment of my invention, it will be appreciated that various changes and modifications of structure may be employed pinion teeth to limit the rotation to a position where the teeth of the body member are behind the pinion teeth, and means carried by the body member for exerting pressure on the shaft of the pinion and simultaneously urging the pin against a tooth of the pinion.

In testimony that I claim the foregoing l have hereunto set my hand at Wausau, in the county of Marathon and State of 'W'isconsin. v

- THOMAS H. JACOB. 

